Question: what are the essential medicine which start with the letter v
Paraphrase: what are the fundamental medication which begin with the letter v
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q35456 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'v')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: valproic acid, valproic acid, Vinblastine, Vinblastine, voriconazole, voriconazole, vincristine, vincristine, verapamil, verapamil, velpatasvir/sofosbuvir, velpatasvir/sofosbuvir, vecuronium bromide, vecuronium bromide, valganciclovir, valganciclovir, vancomycin, vancomycin, vinorelbine, vinorelbine, varicella vaccine, varicella vaccine